A preset tension quick detach buckle (QD buckle)

Abstract

The utility model relates to mechanical connection technical field, and specifically solves the technical problem that traditional quick release device cannot separate automatically when overload, separation threshold precision is low and cannot be reused. Technical scheme main points include: the locking bead of plug assembly inner periphery distribution and the annular clamping groove of socket assembly form the connection, the trigger mechanism that the glass fiber reinforced polyamide trigger ring and disc spring group constitute when axial tension reaches the preset threshold value, trigger ring occurs irreversible plastic deformation, drives locking bead to separate the clamping groove and realizes millisecond level automatic separation; the wear -resisting coating on locking bead surface and curvature optimization design reduce friction loss. The device has the characteristics of quick separation response, threshold adjustable, repeated use, and is mainly used for mountaineering safety rope, industrial robot quick change connector and sports equipment overload protection.

Description

Technical Field

[0001] This utility model relates to the field of mechanical connector technology, and in particular to a quick-release buckle that can automatically separate under a preset tension, which is suitable for scenarios such as safety ropes requiring overload protection, industrial equipment connections, and sports equipment. Background Technology

[0002] Traditional quick-release clips rely on manual operation for separation and cannot automatically disconnect under sudden overload, posing a safety hazard. Existing technologies use shear pin-type overload protection devices, but these suffer from problems such as difficulty in resetting and low accuracy. Summary of the Invention

[0003] Purpose of the invention: To provide a self-separating quick-release buckle with a simple structure and a precisely controllable separation threshold, solving the problems of lag in manual operation and the non-reusability of the shearing pin.

[0004] Technical Solution: To achieve the above objectives, this utility model provides a pre-tension self-separating quick-release buckle (QD buckle), comprising: a plug assembly (1) with a tapered guide at its front end and an annular groove (9) on its inner wall that mates with locking beads (5); a socket assembly (2) with an axially oriented receiving cavity inside, and multiple locking beads (5) distributed circumferentially within the receiving cavity; a pin (3); an elastic pre-tightening unit (6) located at the rear end of the pin (3); and a compressible trigger layer (7) located between the locking beads (5) and the elastic pre-tightening unit. Between (6), it is made of a plastic material with a preset yield strength; when the axial tensile force borne by the plug assembly (1) and the socket assembly (2) reaches a preset threshold, the compressible trigger layer (7) undergoes plastic deformation, and the locking bead (5) retracts radially under the action of the elastic pre-tightening unit (6), disengaging from the annular groove (9), thereby realizing the automatic separation of the plug assembly (1) and the socket assembly (2); the button assembly (4) is connected by bolts and the pin (3) to realize the active separation of the plug and the socket. Preferably, the compressible trigger layer (7) is an annular gasket made of polyurethane, nylon or engineering plastic, and its thickness and yield strength are selected according to the preset separation tensile force value. Preferably, the locking bead (5) is a hard alloy steel ball with a friction-reducing coating on its surface.

[0005] Beneficial effects: Automatic and rapid separation: No manual intervention required, with a response time in milliseconds; Reusability: It can be reset by replacing the trigger layer, resulting in low maintenance costs; Precise and controllable threshold: The separation tensile force is precisely set by considering the material's mechanical properties and structural parameters, with an error of ≤±5%; High compatibility: It can be integrated into standard QD buckle sizes without modifying existing equipment. Attached Figure Description

[0006] Figure 1 Exploded view of the whole; Figure 2 Cross-sectional view of the quick-release buckle connection. Detailed Implementation

[0007] The trigger ring is made of carbon fiber reinforced polyetheretherketone (CF / PEEK) with a yield strength of 210MPa and a preset separation tensile force of 4.5kN. When the payload connection point of the UAV is subjected to an impact force exceeding 4.5kN during flight (such as strong wind or collision), the trigger ring undergoes plastic deformation within 50ms, the locking ball disengages from the slot, and the payload box automatically detaches from the body to prevent uncontrolled fall. The trigger ring is replaceable and reusable, meeting a cycle life of more than 200 cycles. The design without electronic components avoids electromagnetic interference and is suitable for flammable and explosive environments.

Claims

1. A pre-tension self-separating quick-release buckle (QD buckle), characterized in that, include: The plug assembly (1) has a tapered guide at its front end and an annular groove (9) on its inner wall that mates with the locking bead (5); the socket assembly (2) has an axial cavity inside, with multiple locking beads (5) distributed circumferentially within the cavity; a pin (3); an elastic pre-tightening unit (6) located at the rear end of the pin (3); a compressible trigger layer (7) located between the locking bead (5) and the elastic pre-tightening unit (6), made of a plastic material with a preset yield strength; when the axial tensile force borne by the plug assembly (1) and the socket assembly (2) reaches a preset threshold, the compressible trigger layer (7) undergoes plastic deformation, and the locking bead (5) retracts radially under the action of the elastic pre-tightening unit (6), disengaging from the annular groove (9), thereby achieving automatic separation of the plug assembly (1) and the socket assembly (2); and a button assembly (4) connected by bolts and the pin (3) to actively detach the plug and socket.

2. The quick-release buckle (QD buckle) according to claim 1, characterized in that: The compressible trigger layer (7) is an annular gasket made of polyurethane, nylon or engineering plastic, and its thickness and yield strength are selected according to the preset separation tensile force value.

3. The quick-release buckle (QD buckle) according to claim 1, characterized in that: The locking ball (5) is a hard alloy steel ball with a friction-reducing coating on its surface.

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